Rutaceae. 
Haleakala the writer met with trees of this species in the forests above Makawao, 
but there the leaves were all five-foliolate, membraneous, and quite glabrous. This 
latter tree Hillebrand refers to his var. 8. of the same species, though erroneously, 
in the writer’s opinion. The Auahi specimens were collected in November, 1910 
fruiting, no. 8658 in the College of Hawaii Herbarium. On his last visit to 
Auahi the writer photographed one of these trees, which is figured in this book. 
(See plate 78.) 
Hillebrand’s var. f. is five-foliolate and strongly pubescent underneath. The 
leaflets are, however, not smaller than in the species, at least in certain trees, for 
this variety seems to be quite a variable one. The true variety 8. the writer col- 
lected at Puuwaawaa, lava fields of North Kona, fruiting (no. 3651), on June 
17,1909. On his last visit, March, 1912, he collected the variety again, but found 
numerous trees on the Puuwaawaa hill proper, which differed somewhat from 
those found on the plain below, in having much larger leaves and quite pubescent 
follicles; the leaflets are broadly ovate to ovate-acute, while those of the plain 
below are smaller of typical XY. kawaiense shape, and have glabrous follicles. The 
leaf-branch and trunk figured is the true var. 8. Hillebrand’s material came 
from Kawaihaeiuka, a neighboring district. In that latter locality tree growth 
has disappeared to a certain extent, owing to cattle ranches; only the most 
hardy trees have survived. 
Hillebrand’s variety y, with rather large leaflets, comes from Kauai from the 
forests above Waimea, meaning either Halemanu or Kaholuamano. The va- 
riety is represented in the College of Hawaii Herbarium by the number 5960 col- 
lected in the type locality, flowering Sept. 6, 1909 
In order to have this monograph on the genus Xanthoxylum complete, the 
writer wishes to describe a new species belonging to this genus. The same is, 
however, only a shrub three feet or even less high and occurs in the rain forests 
of the Kohala Mts. at an elevation of 4100 feet. It may be described as follows: 
Xanthoxylum Bluettianum Rock sp. nov. 
A sparingly branching shrub 1 m high, ee leaves three-foliolate on petioles 
- 5 to 6.5 em, leaflets ovate, acute, with a cuneate base, the lateral ones unevens sided 5.5 
0 8.5 em x 3 to 5.5 em, thick coriaceous opaque pabertiouk underneath, the patndale of 
the terminal leaflet often a near the blade 2.5 to 3.5 em, those of the lateral 
leaflets 16 to 20 mm; panic the base of the branchlets 8 to 12 em baa with a gray 
pubescent compre ed racist of 5 Flowers unknown. Follicles 1 em, pitted 
pita Tugose, curved; seeds 16 mm, ‘tha woody testa rugose under se black ’ shining 
epide 
Hawaii: High mountains of Kohala at the edge of Honokanenui gulch at an 
elevation of 4100 feet, in company with Schiedea diffusa (fruiting June, 1910, 
Rock n. 8373, type in College of Hawaii Herbarium). 
Named in honor of Mr. P. W. P. Bluett, Manager of Kohala Ditch, through 
whose kindly aid the exploration of Kohala was made possible. 
201 
